Home / 390,814,909.51-539,333,946.08-212,206,325.24

Finding the Fourth Proportional to 390,814,909.51, 539,333,946.08 and 212,206,325.24

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Solution

The fourth proportional to 390,814,909.51, 539,333,946.08 and 212,206,325.24 is: 292,849,817.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,814,909.51 : 539,333,946.08 = 212,206,325.24 : x
  2. Step 2: Convert to fraction form
    390,814,909.51/539,333,946.08 = 212,206,325.24/x
  3. Step 3: Cross multiply
    390,814,909.51x = 539,333,946.08 × 212,206,325.24
  4. Step 4: Simplify right side
    390,814,909.51x = 114,450,074,772,658,960
  5. Step 5: Solve for x
    x = 114,450,074,772,658,960/390,814,909.51
  6. Step 6: Final answer
    x = 292,849,817.11

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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.