Home / 712,784.50-1,069,047.60-286,303.12

Finding the Fourth Proportional to 712,784.50, 1,069,047.60 and 286,303.12

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Solution

The fourth proportional to 712,784.50, 1,069,047.60 and 286,303.12 is: 429,402.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    712,784.50 : 1,069,047.60 = 286,303.12 : x
  2. Step 2: Convert to fraction form
    712,784.50/1,069,047.60 = 286,303.12/x
  3. Step 3: Cross multiply
    712,784.50x = 1,069,047.60 × 286,303.12
  4. Step 4: Simplify right side
    712,784.50x = 306,071,663,308.51
  5. Step 5: Solve for x
    x = 306,071,663,308.51/712,784.50
  6. Step 6: Final answer
    x = 429,402.80

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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.