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Finding the Fourth Proportional to 709,975.04, 979,805.40 and 387,715.10

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Solution

The fourth proportional to 709,975.04, 979,805.40 and 387,715.10 is: 535,068.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    709,975.04 : 979,805.40 = 387,715.10 : x
  2. Step 2: Convert to fraction form
    709,975.04/979,805.40 = 387,715.10/x
  3. Step 3: Cross multiply
    709,975.04x = 979,805.40 × 387,715.10
  4. Step 4: Simplify right side
    709,975.04x = 379,885,348,641.54
  5. Step 5: Solve for x
    x = 379,885,348,641.54/709,975.04
  6. Step 6: Final answer
    x = 535,068.60

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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.