Home / 878,187.40-1,317,281.10-345,417.19

Finding the Fourth Proportional to 878,187.40, 1,317,281.10 and 345,417.19

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Solution

The fourth proportional to 878,187.40, 1,317,281.10 and 345,417.19 is: 518,125.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    878,187.40 : 1,317,281.10 = 345,417.19 : x
  2. Step 2: Convert to fraction form
    878,187.40/1,317,281.10 = 345,417.19/x
  3. Step 3: Cross multiply
    878,187.40x = 1,317,281.10 × 345,417.19
  4. Step 4: Simplify right side
    878,187.40x = 455,011,536,002.11
  5. Step 5: Solve for x
    x = 455,011,536,002.11/878,187.40
  6. Step 6: Final answer
    x = 518,125.79

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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.