Home / 390,139,099.16-537,871,124.18-309,937,201.94

Finding the Fourth Proportional to 390,139,099.16, 537,871,124.18 and 309,937,201.94

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Solution

The fourth proportional to 390,139,099.16, 537,871,124.18 and 309,937,201.94 is: 427,299,574.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,139,099.16 : 537,871,124.18 = 309,937,201.94 : x
  2. Step 2: Convert to fraction form
    390,139,099.16/537,871,124.18 = 309,937,201.94/x
  3. Step 3: Cross multiply
    390,139,099.16x = 537,871,124.18 × 309,937,201.94
  4. Step 4: Simplify right side
    390,139,099.16x = 166,706,271,234,791,008
  5. Step 5: Solve for x
    x = 166,706,271,234,791,008/390,139,099.16
  6. Step 6: Final answer
    x = 427,299,574.94

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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.