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Finding the Fourth Proportional to 978,841.55, 1,350,810.55 and 549,130.91

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Solution

The fourth proportional to 978,841.55, 1,350,810.55 and 549,130.91 is: 757,805.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    978,841.55 : 1,350,810.55 = 549,130.91 : x
  2. Step 2: Convert to fraction form
    978,841.55/1,350,810.55 = 549,130.91/x
  3. Step 3: Cross multiply
    978,841.55x = 1,350,810.55 × 549,130.91
  4. Step 4: Simplify right side
    978,841.55x = 741,771,818,432.22
  5. Step 5: Solve for x
    x = 741,771,818,432.22/978,841.55
  6. Step 6: Final answer
    x = 757,805.82

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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.