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Finding the Fourth Proportional to 571,215.40, 856,823.10 and 291,279.40

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Solution

The fourth proportional to 571,215.40, 856,823.10 and 291,279.40 is: 436,919.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    571,215.40 : 856,823.10 = 291,279.40 : x
  2. Step 2: Convert to fraction form
    571,215.40/856,823.10 = 291,279.40/x
  3. Step 3: Cross multiply
    571,215.40x = 856,823.10 × 291,279.40
  4. Step 4: Simplify right side
    571,215.40x = 249,574,918,474.14
  5. Step 5: Solve for x
    x = 249,574,918,474.14/571,215.40
  6. Step 6: Final answer
    x = 436,919.10

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Half scale
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Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.