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Finding the Fourth Proportional to 707,607.48, 976,345.98 and 421,071.60

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Solution

The fourth proportional to 707,607.48, 976,345.98 and 421,071.60 is: 580,988.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    707,607.48 : 976,345.98 = 421,071.60 : x
  2. Step 2: Convert to fraction form
    707,607.48/976,345.98 = 421,071.60/x
  3. Step 3: Cross multiply
    707,607.48x = 976,345.98 × 421,071.60
  4. Step 4: Simplify right side
    707,607.48x = 411,111,563,952.17
  5. Step 5: Solve for x
    x = 411,111,563,952.17/707,607.48
  6. Step 6: Final answer
    x = 580,988.15

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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.