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Finding the Fourth Proportional to 715,505.08, 987,457.60 and 486,570.23

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Solution

The fourth proportional to 715,505.08, 987,457.60 and 486,570.23 is: 671,508.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    715,505.08 : 987,457.60 = 486,570.23 : x
  2. Step 2: Convert to fraction form
    715,505.08/987,457.60 = 486,570.23/x
  3. Step 3: Cross multiply
    715,505.08x = 987,457.60 × 486,570.23
  4. Step 4: Simplify right side
    715,505.08x = 480,467,471,547.25
  5. Step 5: Solve for x
    x = 480,467,471,547.25/715,505.08
  6. Step 6: Final answer
    x = 671,508.12

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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.