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Finding the Fourth Proportional to 717,681.60, 989,962.66 and 427,098.35

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Solution

The fourth proportional to 717,681.60, 989,962.66 and 427,098.35 is: 589,135.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    717,681.60 : 989,962.66 = 427,098.35 : x
  2. Step 2: Convert to fraction form
    717,681.60/989,962.66 = 427,098.35/x
  3. Step 3: Cross multiply
    717,681.60x = 989,962.66 × 427,098.35
  4. Step 4: Simplify right side
    717,681.60x = 422,811,421,656.39
  5. Step 5: Solve for x
    x = 422,811,421,656.39/717,681.60
  6. Step 6: Final answer
    x = 589,135.10

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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.