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Finding the Fourth Proportional to 551,130.16, 760,603.55 and 309,428.59

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Solution

The fourth proportional to 551,130.16, 760,603.55 and 309,428.59 is: 427,036.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    551,130.16 : 760,603.55 = 309,428.59 : x
  2. Step 2: Convert to fraction form
    551,130.16/760,603.55 = 309,428.59/x
  3. Step 3: Cross multiply
    551,130.16x = 760,603.55 × 309,428.59
  4. Step 4: Simplify right side
    551,130.16x = 235,352,478,675.33
  5. Step 5: Solve for x
    x = 235,352,478,675.33/551,130.16
  6. Step 6: Final answer
    x = 427,036.11

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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.